Chemistry, 25.08.2019 01:30, lathwkuster

bombarding sodium-23 with a
proton produces nuclide x and a neutron. what is nuclide x?
answers:
magnesium-24
magnesium-23
neon-23
s
odium-24
none of the above
the isotope p
has a half-life of 14.3 days. if a sample originally contained 1.00 g of p,
how much was left after 43 days?
answers:
0.250 g
0.125 g
0.750 g
0.500 g
identify x in the reaction
below.
u
+ c
→ cf
+ x
answers:
1
alpha particle
3
protons
6
neutrons
6
electrons
a .20 gram sample of c-14 was allowed to decay for 3 half-lives. what mass
of the sample will remain? carbon-14 has a half life of 5730
years.
answers:
0.025
0.05
0.1
0
.01
0.05
the isotope cu
has a half-life of 30 s. if a sample originally contained 48 mg of cu,
how much time passed before the amount fell to 3 mg?
answers:
120 s
240s
30 s
60 s(when i did my calculation for the question above, i got 60 seconds)
what radionuclide decays to fe-56
by beta emission?
answers:
fe
co
mn
co
mnhow do i know wat it becomes. i put 57 co 27 and it's wrong.
the cf
to cf
conversion is accompanied by
answers:
an alpha
emission
a
neutron capture
an electron
capture
an electron releasei would greatly appreciate your . you.

Answers: 1

Show answers

Answers

Bombarding sodium-23 with a proton produces nuclide X and a neutron. What is nuclide X?

$^{23}_{11}Na--^{\beta^+}-- ^{23}_{10}Ne + e^{+}$

neon
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The isotope P has a half-life of 14.3 days. If a sample originally contained 1.00 g of P,
how much was left after 43 days?

0 days >>> 1.00g
14,3 days >>> 1.00g :2 = 0,5g
(14.3+14.3) days >>> 0.5g : 2 = 0.25g
(14.3+14.3+14.3) days >>> 0.25g : 2 = 0.125g

0.125g
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Identify X in the reaction
below.
U + C → Cf + X

$^{238}_{92}U --- ^{251}_{98}Cf+6e^-$

6 electrons (so it's beta⁻)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

A .20 gram sample of C-14 was allowed to decay for 3 half-lives. What mass
of the sample will remain? Carbon-14 has a half life of 5730
years.

at the beginning >>> 0.20g
1 half-live >>> 0.20g : 2 = 0.10g
2 half-live >>> 0.10g : 2 = 0.05g
3 half-live >>> 0.05g : 2 = 0.025g

0.025g
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

The isotope Cu has a half-life of 30 s. If a sample originally contained 48 mg of Cu,
how much time passed before the amount fell to 3 mg?

0 s (at the beginning) >>> 48mg
30s >>>>>>>>>>>>>>> 48mg : 2 = 24mg
(30+30)s >>>>>>>>>>> 24mg : 2 = 12mg
(30+30+30)s >>>>>>>> 12mg : 2 = 6mg
(30+30+30+30)s >>>>> 6mg : 2 = 3mg

30+30+30+30 = 120s
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
What radionuclide decays to Fe-56 by beta emission?

$^{56}_{26}Fe--^{\beta^-}--^{56}_{27}Co + e^-$

⁵⁶₂₇Co
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The Cf to Cf conversion is accompanied by __________.

Cf to Cf ???? maybe...mistake?

answered: Guest

This would be canberra.

answered: Guest

hurricanes form when warm, moist air from the ocean surface quickly rises into the atmosphere and forms storm clouds and rain. when the clouds are formed, heat is released which warms the cool air in the upper regions of the atmosphere so that the cycle can continue. which two phases of the water cycle are repeated in this process?

Other questions on the subject: Chemistry

Chemistry, 22.06.2019 03:30, babygirl1780

Nanotechnology, the field of trying to build ultrasmall structures one atom at a time, has progressed in recent years. one potential application of nanotechnology is the construction of artificial cells. the simplest cells would probably mimic red blood cells, the body's oxygen transporters. for example, nanocontainers, perhaps constructed of carbon, could be pumped full of oxygen and injected into a person's bloodstream. if the person needed additional oxygen-due to a heart attack perhaps, or for the purpose of space travel-these containers could slowly release oxygen into the blood, allowing tissues that would otherwise die to remain alive. suppose that the nanocontainers were cubic and had an edge length of 24 nanometers. part a part complete what is the volume of one nanocontainer? (ignore the thickness of the nanocontainer's wall.) express your answer using two significant figures. v v = 1.4ă—10â’20 l previous answers correct significant figures feedback: your answer 1.3824â‹…10â’20 = 1.382ă—10â’20 l was either rounded differently or used a different number of significant figures than required for this part. if you need this result for any later calculation in this item, keep all the digits and round as the final step before submitting your answer. part b suppose that each nanocontainer could contain pure oxygen pressurized to a density of 81 g/l . how many grams of oxygen could be contained by each nanocontainer?

Answers: 3

continue

Chemistry, 22.06.2019 14:30, Tooey2331

1) describe the physical layout of the ocean floor ? 2) explain how the dumbo octopus swims differently than other octopus species and why this would be an advantage in the aphonic zone . 3) why are the types of organisms that live at each underwater hot vent so dramatically different ?

Answers: 3

continue

Chemistry, 22.06.2019 14:50, chem1014

Given the following information: mass of proton = 1.00728 amu mass of neutron = 1.00866 amu mass of electron = 5.486 × 10^-4 amu speed of light = 2.9979 × 10^8 m/s calculate the nuclear binding energy (absolute value) of 3li^6. which has an atomic mass of 6.015126 amu. j/mol.

Answers: 2

continue

Chemistry, 22.06.2019 16:30, ava1018

How many grams of mgbr2 are needed to produce 75g or metal?

Answers: 1

continue

Do you know the correct answer?

bombarding sodium-23 with a
proton produces nuclide x and a neutron. what is nuclide x?